Firstly, deep freeze the butter until it gets hard. Then, put in the flour and half a piece of small butter into a bowl. Also, add in the bread crumbs.
Now, put in the lemon juice and 1 cup of ice-cold water in the bowl. Make a dough by mixing it properly. Add in the leftover butter and mix it with the dough in such a way that the dough absorbs all the butter properly.
The next step is to roll the pastry on a surface where a little bit of flour is poured and cut into rectangular shapes. Then, fold the ends of the rectangle into the middle and then roll it again and do the same type of folding 3 more times. Give the pastry rest for almost 15 minutes each and then refrigerate it for 30 minutes.
Now, for preparing the stuffing, melt the butter. Add currants, sugar, lemon zest, orange zest, cinnamon, allspice, nutmeg and diced dried papaya and mix it well and keep it still.
Now, roll the pastry and cut it into a round shape. Add in the stuffing and put little water on the sides to bind up the pastry. Place it on a baking tray and sprinkle sugar and coat with egg white.
Now, at last, bake the cakes for 16- 18 min until they get golden brown. Then, serve them.